the402 endpoint detail

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x402stock.xyz v1 form-144

https://x402stock.xyz/api/v1/form-144

answers 402

Market-wide recent Form 144 insider intent-to-sell notices across all US issuers — who is filing to sell, before the Form 4 confirms it. Per notice: ticker, issuer, insider, shares to be sold, aggregate market value, and approximate sale date. Tune the window with `?days=` (max 90) or `?startdt`/`?enddt`, and `?limit=` (max 50). Proposed sales, not executed. From SEC EDGAR. From x402stock

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.02
Network
base
Pay to
0x3070Fbb3803819fB5BdfE9286fdc6325A877fA85
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
GET
Response latency
144 ms
Payment options
1 usable of 1
Last checked
2026-08-15T14:31:44.568Z (2d ago)
Category
data

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fx402stock.xyz%2Fapi%2Fv1%2Fform-144"